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All Journal Journal of Mechanical Engineering Science and Technology Turbo : Jurnal Program Studi Teknik Mesin STEAM Engineering : Journal of Science, Technology, Education And Mechanical Engineering Jurnal Pendidikan Vokasi Otomotif Automotive Experiences Abdimas Indonesian Journal Jurnal Polimesin
Pratama, Muhammad Yandi
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Religion Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Analisis Eksperimental Kebisingan dan Tekanan Balik pada Three-Pass Perforated Muffler Pratama, Muhammad Yandi; Suprayitno, Suprayitno; Trihutomo, Prihanto; Ariyanto, Sudirman Rizki
TURBO [Tulisan Riset Berbasis Online] Vol 12, No 2 (2023): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i2.2719

Abstract

Kebisingan kendaraan bermotor berdampak negatif terhadap kenyamanan dan lingkungan. Muffler berperan penting dalam mengurangi kebisingan gas buang, sehingga memerlukan pengendalian kebisingan yang efektif. Penelitian ini bertujuan menganalisis karakteristik kebisingan dan tekanan balik pada three-pass perforated muffler, komponen penting dalam sistem knalpot kendaraan. Desain three-pass perforated muffler menggunakan prinsip akustik dengan tiga saluran dinding berlubang yang dirancang khusus, bertujuan meredam kebisingan dan mengendalikan tekanan balik gas buang. Penelitian ini menggunakan metode pengukuran akustik dan sensor tekanan. Prototipe muffler three-pass perforated diuji dalam berbagai skenario operasional, termasuk variasi putaran mesin. Data yang telah dikumpulkan dianalisis secara kuantitatif untuk analisis kebisingan dan tekanan balik. Evaluasi komprehensif dilakukan untuk mengukur kinerja muffler dalam mengurangi kebisingan dan tekanan balik. Hasil penelitian menunjukkan bahwa tingkat kebisingan yang dihasilkan three pass perforated muffler masih berada di bawah ambang batas kebisingan yang diperbolehkan oleh Permen LHK tentang Baku Matu Kebisingan Kendaraan bermotor yakni sebesar 88 dB. Tekanan balik yang dihasilkan juga masih berada di bawah ambang batas yang diperbolehkan, mengacu pada Asosiasi VERT. Temuan ini memiliki potensi pada pengembangan solusi yang lebih efektif dalam mengendalikan kebisingan kendaraan bermotor yang lebih baik dan memberikan pengalaman berkendara yang lebih nyaman.
Optimization of Metallic Catalytic Converters to Reduce CO Emissions and Increase Engine Power Warju, Warju; Ariyanto, Sudirman Rizki; Pratama, Muhammad Yandi; Haratama, Kusuma Refa
Automotive Experiences Vol 7 No 2 (2024)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.11587

Abstract

Metallic catalytic converter (MCC) is one of the technologies widely applied to motorcycle exhausts which aims to improve exhaust emission to be more environmentally friendly. However, even though many studies have been conducted, optimal design has not been achieved compared to other designs. Through this research, the Taguchi method is proposed as an alternative method to find the optimum parameters of MCC. The Taguchi method was chosen because of its ability to find a robust combination of parameters. There are four MCC parameters used as inputs while each parameter consists of three levels, thus the design used is the L18 Orthogonal Array (OA) which each combination is tested on three types of motorcycles, namely Moped, Automatic, and Sports. The signal-to-noise ratio (S/N) was adopted as one of the quality indicators of each combination. The optimization results showed that the best MCC design to reduce CO emissions is STD PGM. However, the optimum CO design can be used as an alternative because the difference in the S/N ratio is only -0.372. Meanwhile, the optimum CO design has another advantage over the STD PGM, namely the S/N value of the power ratio which tends to be higher with a difference of 5.037 compared to the STD PGM. Then, the best MCC design capable of increasing power is the optimum power design. The optimum power design has a superior S/N ratio with a difference of 5.404. In terms of emission, the optimum power design tends to be lower by a difference of -1.875 compared to the STD PGM.
Analyzing Transition Metal Catalytic Converter Impact on Four-Stroke Motorcycle Fuel Consumption Ariyanto, Sudirman Rizki; Nugraha, Ata Syifa'; Cahyadi, Wahyu Robby; Dianastiti, Yelma; Pratama, Muhammad Yandi
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 7, No 2 (2023)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v7i22023p119

Abstract

Increased exhaust emissions from motor vehicles have become a major concern in efforts to reduce air pollution. One developed solution is the use of transition metallic catalytic converter (TMCC) technology in vehicle exhaust systems. This study aims to compare the fuel consumption efficiency of three types of exhaust systems, namely standard exhaust without a catalyst (STD WC), the standard exhaust with Original Equipment Manufacturer catalyst (STD OEM), and an exhaust system equipped with a Copper-Coated Chrome Metallic Catalytic Converter (TMCC CuCr). The data analysis method employed a quantitative approach by collecting fuel consumption data at each rpm and analyzing the mean and standard deviation. The research findings indicate that STD OEM has a lower average fuel consumption (0.80 liters per hour) and smaller standard deviation (0.06) compared to TMCC CuCr (0.83 liters per hour and 0.07). Although TMCC CuCr demonstrates good efficiency, STD OEM remains the best choice in terms of fuel efficiency. However, if the differences in fuel consumption and standard deviation are considered insignificant, TMCC CuCr could be a more economical alternative with its affordable price and greater material availability. Furthermore, its fuel consumption performance is not significantly different from that of STD OEM.
Transformasi Limbah Plastik Menjadi Fiber Polyester: Strategi Pengurangan Pencemaran Lingkungan dan Peningkatan Ekonomi Desa Sumberdem, Kabupaten Malang Irawan, Dani; Sutadji, Eddy; Suharmanto, Suharmanto; Annisya, Annisya; Pratama, Muhammad Yandi; Yuniar, Mirza
Abdimas Indonesian Journal Vol. 4 No. 2 (2024)
Publisher : Civiliza Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59525/aij.v4i2.464

Abstract

Waste that has not been handled properly is located in Sumberdem Village, Malang Regency. Waste processing has so far been carried out by separating organic and inorganic waste. Organic waste is processed into compost because it is easily decomposed and can help fertilize the soil, such as use in coffee plantations. The problem is inorganic waste in the form of plastic that is not utilized properly. So far, plastic waste has been dumped on riverbanks and burned so that it causes new problems, namely environmental pollution from the smoke from burning. Based on the problems that have been identified by the community service team, the solutions offered are: (1) Creating appropriate technology in the form of a rotary type plastic pet pelletizer machine, (2) Workshop on the Application of Appropriate Technology (TTG). The method used in this community service activity is community empowerment which is carried out through training and knowledge transfer. The results of this activity are (1) Development of appropriate technology in the form of a Rotary Type Plastic PET Pelletizer machine has been proven effective in processing plastic waste into polyester fiber plastic pellets, (2) Through technical guidance on the use of the Rotary Type Plastic PET Pelletizer machine, waste recycling business actors can operate the machine better and more efficiently.
ANALISIS KEGAGALAN PADA PATAHAN MATA BOR TIPE HIGH SPEED STEEL Ariyanto, Sudirman Rizki; Pratama, Muhammad Yandi; Warju, Warju; Hidayatullah, Rachmad Syarifudin; Anwari, Muhammad Syahrul
Steam Engineering Vol. 6 No. 2 (2025): STEAM Engineering, Vol. 6, No. 2, Maret 2025
Publisher : Program Studi Pendidikan Teknik Mesin, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37304/jptm.v6i2.19625

Abstract

Drill bit failure in the drilling process often occurs due to exposure to mechanical, thermal, and chemical loads during operation. Nachi HSS drill bits, as critical components in the manufacturing industry, are prone to sudden wear and breakage due to dynamic processes involving material fragmentation, friction, and increased local temperatures. This study analyses the root cause of Nachi HSS drill bit failure through fracture investigation, chemical composition, and microstructure. The analysis methods include macroscopic testing to identify fracture patterns, optical microscopy to evaluate surface deformation, and X-ray Fluorescence (XRF) testing to verify material composition. The results showed that the fault was a brittle fracture due to a mismatch in chemical composition: molybdenum (Mo) levels were not detected. At the same time, chromium (Cr) and vanadium (V) only reached 3.85% and 0.95%, 0.45% lower than factory standards. This deficiency reduces resistance to thermomechanical loads, triggering stress concentration and rapid crack propagation during the drilling of ST37 steel material at a speed of 1,800 RPM. These findings emphasize the importance of quality control of material composition and optimization of operating parameters to prevent premature failure.
Mengoptimalkan Penggunaan Youtube Sebagai Media Pembelajaran Untuk Meningkatkan Prestasi Belajar Siswa SMK Warju, Warju -; Ariyanto, Sudirman Rizki; Umaroh, Susi Tri; Pratama, Muhammad Yandi; Nugraha, Ata Syifa
Jurnal Pendidikan Vokasi Otomotif Vol. 6 No. 2 (2024): (Mei)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpvo.v6i2.73122

Abstract

This research aims to analyze the effectiveness of learning media and mathematical logic intelligence on student learning achievement. This research was a quasi-experimental type with a sample size of 68 students consisting of an experimental class and a control class of 34 students each. The data analysis method uses two-way Anova. The results of this study indicate that there are (1) differences in learning achievement between students who study using YouTube compared to e-books; (2) differences in learning achievement between students with high versus low mathematical logical intelligence; and (3) the interaction between learning media and mathematical logic intelligence on student learning achievement.
Exhaust Emission Control in Sport Motorcycles: A Comparison of Catalytic Converters with Alternative Metal Materials Warju, Warju; Ariyanto, Sudirman Rizki; Pratama, Muhammad Yandi
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4092

Abstract

In this modern era, motor vehicles have brought significant changes in human life. Faster and more efficient mobility has increased connectivity between regions, supported economic growth, and improved quality of life. However, increased mobility also means an increase in vehicle exhaust emissions, which contribute to climate change and air pollution. One effective technology for controlling exhaust emissions is the use of catalytic converters. Metal catalytic converters, such as copper, brass, and chrome-plated copper, have been researched as more affordable and effective catalyst alternatives. This research aims to analyze the optimal design of exhaust systems with catalytic converters among three types of alternative materials (copper, brass, and chrome-plated copper) as well as standard exhaust systems without catalysts (STD NC) and standard platinum group metal exhaust systems (STD PGM) in maximizing the reduction of motor vehicle exhaust emissions. An experimental research design was used by utilizing a 2015 Yamaha Vixion Lightning as the research object. Catalytic converters were prepared with specific specifications to ensure consistency and accuracy in measurements. CO (carbon monoxide), HC (hydrocarbons), CO2 (carbon dioxide), and O2 (oxygen) emissions were analyzed using an Exhaust Gas Analyzer. The research results indicate that the CuCr sample exhibits excellent performance in reducing CO and HC emissions. The CuCr sample has an average CO emission of 4.09% Vol with a standard deviation of 1.46, demonstrating good consistency in CO emissions. Meanwhile, the average HC emissions from the CuCr sample are 320 ppmVol with a standard deviation of 106, indicating good consistency in HC emissions. All samples meet the emission standards set by the government, except for the STD NC sample, which exceeds the CO emission threshold.
Co-Authors Annisya, Annisya Anwari, Muhammad Syahrul Ariyanto, Sudirman Rizki Ata Syifa’ Nugraha Cahyadi, Wahyu Robby Dani Irawan Eddy Sutadji Haratama, Kusuma Refa Hidayatullah, Rachmad Syarifudin Nugraha, Ata Syifa Prihanto Trihutomo Suharmanto Suprayitno Suprayitno Umaroh, Susi Tri WARJU Warju, Warju - Yelma Dianastiti Yuniar, Mirza